“Hunchback Amphipod” (Iphemedia gibba)

…a strikingly marked  blue and yellow species of Gammarid amphipod that is known to occur along the coast of South Africa, ranging from the Cape Peninsula to Port Elizabeth. Hunchback amphipods are often encountered from the subtidal zone down to at least 25 meters (82 feet), where it often seen near sessile invertebrates like sponges or corals. 


Animalia-Arthropoda-Crustacea-Malacostraca-Amphipoda-Gammaridea-Iphimediidae-Iphimedia-I. gibba

Image: seascapeza

Nototropis falcatus

….is a species of Gammarid amphipod that occurs in waters from northern Norway to the west coast of Ireland, including the North Sea. It is also known to occur as far south as the southern Bay of Biscay. N. falcatus is typically whitish in color and can grow to a length of around 7 millimeters (0.28 in). It typically inhabits fine sand at depths of 10-50 meters (33-164 ft) where it likely grazes on a variety of plant matter and detritus. 


Animalia-Arthropoda-Crustacea-Malacostraca-Amphipoda-Gammaridea-Atylidae-Nototropis-N. falcatus

Image: Hans Hillewaert